2018/12/16 by Zhuoying Jiang, Jiang, Zhuoying, Xiong Yu +1
Energy · Environmental Science · #Air Quality and Health Impacts #Applied Physics (physics.app-ph) #Chemical Physics (physics.chem-ph) #FOS: Physical sciences #Indoor Air Quality and Microbial Exposure #TiO2 Photocatalysis and Solar Cells
paper · pdf · doi:10.48550/arxiv.1905.06936
openalex publication_date 2018/12/16 · openalex created_date 2019/07/23 · openalex updated_date 2026/07/28
Titanium dioxide (TiO2) is a known photocatalyst with a capability of decomposing organic substance. However, the photocatalysis of the pure TiO2 is not effective for the indoor environment due to a lack of the ultraviolet irradiation inside the building. Doping TiO2 with substance such as C, N or metal can extend the threshold of the absorption spectrum to the visible spectrum region. Thus, doped-TiO2 is able to decompose volatile organic compounds (VOCs) under an indoor environment. To date, most experimental work reported on photocatalytic kinetics were conducted inside small-scale devices. The performance of air purification function under the actual indoor application scenery need to be further clarified. For this purpose, it is crucial to predict the performance of autogenous air quality improvements by visible light driven photocatalyst for the actual applications. This work has developed a model to evaluate the performance of functional coating with photocatalyst in removing VOCs. Factors such as the effects of coating designs and indoor ambient conditions on the air purification efficiency were studied. This work demonstrates that doped-TiO2 photocatalytic coating is effective to improve the indoor air quality.